     Util
     BlockPrefix
     BlockPrefix$BlockType
-    DurableAccumulator
+    AccumulatorOutput
     ChunkSort]))
 
 (set! *warn-on-reflection* true)


(defspec test-vlq-roundtrip iterations
  (prop/for-all [n gen-pos-int]
    (let [out (doto (DurableAccumulator.)
                (.writeVLQ n))
          in  (->> out
                .contents

(defspec test-prefixed-vlq-roundtrip iterations
  (prop/for-all [n gen-pos-int
                 bits (gen/choose 0 6)]
    (let [out (AccumulatorOutput.)
          _   (Util/writePrefixedVLQ 0 bits n out)
          in  (->> out .contents DurableInput/from)]
      (try
